my 15 wk fully bf ds has stopped pooing! i know that bf babies can often go for long spells between poos, but what concerns me is the fact that he's suddenly changed from being a frequent pooer (twice a day, at least), to just a couple in the last week (it was also thicker than usual when he did go...sorry if TMI!). can only link this change with his 2nd imms, which he had last tues...are they connected, & any cause for concern do you think??